Central Andes

Central Andes

 

the part of the Andes that lies between 15° and 28° S lat. in Peru, Bolivia, Chile, and Argentina. It attains a maximum width of 750 km. The central part is occupied by the Puna de Atacama, an interior high plateau with elevations of 3,700–4,100 m and separate ridges rising to 6,000 m, and by the Altiplano, a depressed level plain. On the east the Puna is framed by massifs of the Cordillera Central, which soar to a height of 6,550 m in the Cordillera Real. On the west, extinct and active (Misti, Llullaillaco) volcanoes of the Cordillera Occidental rise to more than 6,800 m; the highest peak is Mount Ojos del Salado (6,880 m). Volcanic material covers the western and southern parts of the Central Andes. Mineral resources include major deposits of tin ore at Potosí and Llallagua, tungsten and antimony at Caracoles, and copper at Chuquicamata and El Salvador, as well as bismuth, silver, iron, and complex ores.

The region has a tropical high-mountain climate. On the windward eastern slopes, receiving 1,000–3,000 mm of precipitation a year, the climate is humid. The Puna and the western regions have a markedly continental climate. Mean monthly temperatures in the Puna vary from 4°C to 8°–10°C. The annual precipitation in the Puna ranges from 500–600 mm in the northeast to less than 100 mm in the southwest and west. The region is subject to high winds. The Central Andes have the world’s highest snow line, which rises from 4,850 m in the east to 6,500 m in the interior. Whereas the eastern slopes are cut by the canyons of numerous rivers, only intermittent streams flow in the west. The Puna is an interior drainage area, with most of the runoff entering Lake Titicaca and Lake Poopó. The region has many salt flats, called salares (Coipasa, Uyuni, and Atacama). The high-mountain steppes in the northern and northeastern Puna afford pasture for livestock. Grain crops and potatoes are cultivated to an elevation of 4,000 m. In the west and south there are semideserts and deserts. Moderately humid tropical mountain forests cover the eastern slopes.

E. N. LUKASHOVA

References in periodicals archive ?
The Quechuan language (written also as Quichua and Kichwa) was widely spoken across the central Andes long before the time of the Incas, who adopted it as the official administration language for their empire.
Recently, the Company signed a two-year option agreement to acquire a 100% interest in the Coricancha Mine Complex in the central Andes of Peru and, through the acquisition of Cangold Limited, now holds an option to acquire a 100% interest in the advanced stage Guadalupe de los Reyes Project in Mexico.
In this instalment, Kenneth Hirth and Joanne Pillsbury revisit trade and markets in the economic context of the Americas, specifically that of three regions: the Mexican Highlands, the Mayan region in Central America and the Central Andes in South America.
A group run by Amsterdam-based trader Trafigura Beheer began operations at a $163 Million minerals pier in Peru's biggest port Thursday to deal with rising transport demand from new mines and expansions in the central Andes.
Lepidium meyenii (maca) is a Peruvian plant of the Brassicaceae family cultivated for more than 2000 years, which grows exclusively in the central Andes between 4000 and 4500 m altitude.
of East Anglia) presents a prehistory of the Central Andes, drawing on the archaeological record of social and cultural developments before written accounts began in the early 16th century, and integrating insights from such fields as art history, anthropology, environmental and geological studies, and history.
London, May 9 (ANI): A new study has found that the region east of the central Andes Mountains has the potential for larger scale earthquakes, than previously expected.
Specific topics covered include the Aral Sea disaster, microprobe monazite geochronology, microsampling and isotopic analysis of igneous rocks, the crustal dichotomy on Mars, and the tectonics and climate of the Southern Central Andes.
At distances larger than 400 km east of the central Andes the hypocentral parameters are not well constrained, and are assumed to be distributed nearly horizontally at 120 km-depth, as observed in Figure lb (dashed line).
In fact, there are also dramatic regional differences in the timing and type of uplift (Taylor, 1991, 1995): Parts of the Southern and Central Andes date back 85 million years or more, whereas the time line of the Northern Andes begins only about 55 million years ago.
Andresmin is committed to building shareholder value through the acquisition, exploration, and development of high-quality mineral projects in the prime Central Andes region of South America, which annually produces 42% of the world's copper (over $18 billion each year).
The Soledad property is located within the Central Andes tertiary volcanic belt, approximately 35km south of the Barrick Gold's Pierina Mine.

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